Renaming some gachapons

Would anyone mind if I rename some of the old gachapons? We don't exactly need to specify the ending date in the page's title for some e.g. the holiday ones like Valentine's Day Gift Box (Ended 2012-03-15) could simply be named "Valentine's Day Gift Box (2012)" instead. Makes it look cleaner on item pages.

I like the usage of the year rather than the end date in the title.

Lot easier to type too.

I changed most of them. I'm going to wait on the (Ended 2012-xx-yy) gachapons in case they get re-instated before the end of this year. If they don't, I'll then move them to (2012).